McAlpine ST90CPB-S-53 Shallow Shower Drain Waste with Slotted Brass Grate

McAlpine ST90CPB-S-53 Shallow Shower Drain Waste with Slotted Brass Grate

Features

This genuine McAlpine shower drain waste is a premium, ultra-shallow drainage solution engineered specifically for low-profile shower trays and restricted floor voids. Bearing the manufacturer part number ST90CPB-S-53, its standout feature is an incredibly compact 53mm under-tray height that easily solves tight installation challenges. Designed for shower trays with a standard 90mm hole, it features a heavy-duty chrome-plated solid brass top flange with a classic slotted grate design. This high-performance trap utilizes a robust stainless steel clamping ring secured by three fixing screws to guarantee an absolute watertight seal against the tray, while the removable grid allows for effortless cleaning from above.

• Ultra-shallow 53mm under-tray height fits into exceptionally tight floor spaces
• Genuine McAlpine professional plumbing hardware proudly manufactured in the UK
• Premium chrome-plated solid brass top flange with an elegant slotted grate design
• Heavy-duty stainless steel clamping ring with 3 securing screws ensures a leak-free seal
• Removable slotted grid configuration facilitates incredibly easy cleaning from above
• Supplied complete with a high-integrity 1.5″ (43mm) solvent weld socket connection
• Delivers a reliable flow rate of 24 litres per minute under a constant water head
• Manufactured from high-impact polypropylene with an internal 25mm water seal

Technical

• Brand: McAlpine
• Part Number: ST90CPB-S-53
• Overall Under-Tray Height: 53mm (Ultra-Low Profile)
• Tray Hole Compatibility: 90mm Diameter Waste Hole
• Grate Design: Slotted Grate
• Grate Material: Chrome-Plated Solid Brass
• Fixing Mechanism: Stainless Steel Clamping Ring with 3 Securing Screws
• Water Seal Depth: 25mm
• Outlet Connection: 1.5″ BSP / 43mm Outside Diameter (OD) Solvent Weld Socket
• Flow Rate: 24 Litres per Minute (Tested under constant 15mm head)
• Material: Rigid Polypropylene, Stainless Steel, and Solid Brass
• Certification: Conforms to Clause 5 of BS EN 274-2:2002

Details

Fitting a high-quality shower waste beneath modern low-profile trays or into restricted upper-floor joist spaces is an absolute nightmare. Consequently, standard deep traps force you to cut dangerously into structural timber joists or lift up the entire bathroom floor. Furthermore, flimsy generic traps often rely on weak plastic threads that flex over time, leading to joint degradation. As a result, the seal against the shower tray fails under daily foot pressure. This inadequate setup creates hidden tracking leaks, warping your floorboards, rotting your joists, and causing thousands in structural ceiling damage below.

Fortunately, installing this ultra-shallow McAlpine shower drain waste eliminates both tight-space restrictions and leak anxieties completely. Specifically, the ultra-low profile 53mm depth slides effortlessly into the tightest floor gaps without needing structural modifications. Additionally, instead of relying on plastic threads, it uses a rock-solid stainless steel clamping ring and three heavy-duty screws to mechanically lock the trap tightly to the tray surface. The removable brass slotted grid also lifts out easily for simple clearing from above. Consequently, you get an incredibly secure, low-profile, and permanently watertight installation.